英语中的时态转换题是常见的语法题型，对于学习英语的人来说，不仅需要掌握各种时态的用法，还需要能够快速地将一种时态转换成另一种。
在时态转换中，最常见的是将一种时态转换成另一种时态，例如将现在时转换成过去时、将过去时转换成将来时等。
下面是一些常见的时态句型转换题：
现在进行时转换成一般现在时
原句：She is cooking dinner now.
转换后：She cooks dinner.
一般过去时转换成过去进行时
原句：He ate lunch at 12 o'clock yesterday.
转换后：He was eating lunch at 12 o'clock yesterday.
将来进行时转换成一般将来时
原句：They will be watching TV at 9 pm tonight.
转换后：They will watch TV at 9 pm tonight.
现在完成时转换成一般过去时
原句：I have finished my homework.
转换后：I finished my homework.
过去完成时转换成过去进行时
原句：She had written three letters by 8 pm yesterday.
转换后：She was writing three letters by 8 pm yesterday.
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